To trigger the free spins, players are required to hit three Holmes or Watson symbols anywhere on the reels. The number of free spins will vary based on the free spin meter. As more base game spins are played, the free spins meter fills up with additional free spins.

During the Free Spins feature, more spins are awarded in accordance with the Holmes and Watson symbols shown below:

• Two extra spins are awarded for two Holmes or Watson symbols.

• Five extra spins are awarded for three Holmes or Watson symbols.

• Eight extra spins are awarded for four Holmes or Watson symbols.

• Ten extra spins are awarded for five Holmes or Watson symbols.

• Fifteen extra spins are awarded for six Holmes or Watson symbols.